Mobile phone manufacturers should design technology to prevent people from texting and driving because this behavior is extremely dangerous. Researchers have done studies that show that texting drivers are worse than drunk drivers. This might sound crazy, but this happens because texting drivers take their eyes off the road. They are unable to react to any danger that they don't see.
It would be good for phone manufacturers to develop this technology for two main reasons. First, it would save lives. Second, it would show that the industry is doing everything they can to stop texting and driving, which would help defend the industry from any possible legal claims.
Researchers should design consumer safety technology to prevent people from texting and driving at the same time. This is because people do not always make the right decisions. If a tech company comes up with a way to detect high speeds (higher than walking speed), then perhaps they can shut off the texting device.
Yes, researchers should design consumer safety technology to prevent people from texting and driving, because it is activity that is extremely dangerous. The only way to prevent it from happening is to make it so that people do not have the option. With people dying, there is no reason to allow it.
Yet another nanny approach to something that should be born of common sense. To make technology that would prevent texting and driving means only that people will find a way around such technology. Thus, all those millions in research and development wasted. Personal responsibility IMO, should always be the first defense against blatant disregard for safety such as texting and driving.